﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Management;
using System.Security.Cryptography;
using System.IO;

namespace HCDV.HCSP
{
    public class checksys
    {
        public string gethcsysid()
        {
            return "H" + GetCpuID() + "123" + GetHardDiskID()+ "789" + "C";
        }
        public string gethsyskey()
        {
            var re= EncryptDES(gethcsysid(), "chaoscut").Replace("+", "HCJ").Replace("/", "HCP").Replace("=", "HCD");
            return re;
        }
        private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };   
        /// DES加密字符串          
        /// 待加密的字符串  
        /// 加密密钥,要求为8位  
        /// 加密成功返回加密后的字符串，失败返回源串   
        public  string EncryptDES(string encryptString, string encryptKey)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Convert.ToBase64String(mStream.ToArray());
            }
            catch
            {
                return encryptString;
            }
        }
        ///   
        /// DES解密字符串          
        /// 待解密的字符串  
        /// 解密密钥,要求为8位,和加密密钥相同  
        /// 解密成功返回解密后的字符串，失败返源串  
        public  string DecryptDES(string decryptString, string decryptKey)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Convert.FromBase64String(decryptString);
                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Encoding.UTF8.GetString(mStream.ToArray());
            }
            catch
            {
                return decryptString;
            }
        }
        /// <summary>
        /// 获得CPU编号
        /// </summary>
        /// <returns></returns>
        private string GetCpuID()
        {
            string result = "";
            try
            {
                ManagementClass mc = new ManagementClass("Win32_Processor");
                ManagementObjectCollection moc = mc.GetInstances();

                foreach (ManagementObject mo in moc)
                {
                    result = mo.Properties["ProcessorId"].Value.ToString();
                }
            }
            catch
            {
                return "获取CPUID失败";
            }
            return result;
        }

        /// <summary>
        /// 获得硬盘编号
        /// </summary>
        /// <returns></returns>
        private string GetHardDiskID()
        {
            string result = "";
            try
            {
                ManagementClass mcHD = new ManagementClass("win32_logicaldisk");
                ManagementObjectCollection mocHD = mcHD.GetInstances();
                foreach (ManagementObject m in mocHD)
                {
                    if (m["DeviceID"].ToString() == "C:")
                    {
                        result = m["VolumeSerialNumber"].ToString().Trim();
                    }
                }
            }
            catch
            {
                return "获取硬盘ID失败";
            }
            return result;
        }

        /// <summary>
        /// 获得网卡MAC
        /// </summary>
        /// <returns></returns>
        private string GetMac()
        {
            string result = "";
            try
            {
                ManagementClass mcMAC = new ManagementClass("Win32_NetworkAdapterConfiguration");
                ManagementObjectCollection mocMAC = mcMAC.GetInstances();
                foreach (ManagementObject m in mocMAC)
                {
                    if ((bool)m["IPEnabled"])
                    {
                        result = m["MacAddress"].ToString();
                    }
                }
            }
            catch
            {
                return "获取MAC失败";
            }
            return result;
        }
    }
}
